Question

Ovulation in the human female normally takes place during the menstrual cycle
A. Just before the end of secretory phase
B. At the mid of secretory phase
C. At the end of proliferative phase
D. At the beginning of proliferative phase

Answer 1

The monthly set of changes that a woman's body goes through in preparation for the potential of pregnancy is known as the menstrual cycle. Ovulation is the monthly release of an egg from one of the ovaries. Hormonal changes prepare the uterus for pregnancy at the same time. If ovulation occurs but the egg is not fertilised, the uterine lining sheds via the vaginal opening. This is a menstrual period.

Complete answer:
Option A: The corpus luteum produces plasma levels of $17$-beta-estradiol and progesterone near the conclusion of the secretory phase. A fertilised ovum is implanted within the endometrium if pregnancy occurs, and the corpus luteum persists and maintains hormone levels.
So, option A is not correct.
Option B: It's a common occurrence in women of childbearing age. The endometrium expands after ovulation under the influence of progesterone. The endometrial glands become long and twisted during this period, and secretion begins.
So, option B is not correct.
Option C: The completely mature ovarian follicle is used for secondary oocyte ovulation (Graafian follicle). Ovulation is triggered by an increase in LH level toward the end of the proliferative phase. The secretory or luteal phase follows the ovulatory phase.
So, option C is correct.
Option D: The ovulatory phase, which occurs at the end of the proliferative phase, is when ovulation occurs.
It occurs on the $14$th day of the menstrual cycle, and is started by a surge in Estrogen, which causes the pituitary to release Luteinizing hormone.
So, option D is not correct.

So, option C is the correct answer.

Additional information:
During the follicular phase, rising oestrogen levels cause your pituitary to release LH. This is frequently what initiates the ovulation process. The only moment during your cycle when you can get pregnant is during ovulation.
The corpus luteum develops after the egg is liberated from the follicle. Hormones are released by this structure. The rise in hormones keeps your uterine lining thick and ready to implant an embryo. Her body will produce hCG if she is pregnant. Pregnancy tests frequently identify this hormone. It aids in the thickening of the uterine lining and the maintenance of the corpus luteum.

Note:
If you have a $28$-day period, ovulation occurs around day $14$ — exactly in the middle of your cycle. It lasts approximately $24$ hours. If the egg isn't fertilised within a day, it will perish or possibly dissolve. The follicular phase is the name given to the proliferative period.
Ovulation occurs in the human female throughout the menstrual cycle, when $17$-beta-estradiol levels are high due to follicular maturation and increased hormone synthesis. At this point, the endometrium has thickened.